Scotch marine boiler



R. WALSH.

Patentafl 00L 7, 1919.

2 SHEETS-SHEET I.

THE COLUMBIA PLANnnuw 1 WASHINGTON. n. r.

R. WALSH. I

SCOTCH MARINE BOILER.

I APPLICATION FILED DEC- 20,1917- 1,317,744. Patented Oct. 7,1919.

2 SHEETS-SHEET 2.

OOOOOOOO OOOOOOOO RICHARD WALSH, OF MOBILE, ALABAMA.

SCOTCH MARINE BOILER.

Specification of Letters Patent.

Patented. Oct. 7, 1919.

Application filed December 20, 1917. Serial no. 208,066.

To all whom it may concern.

Beit known that I, RICHARD WALSH, a citizen of the United States, residing at Mobile, in the county of Mobile and State of Alabama, have invented certain new and useful Improvements in Scotch Marine Boilers, of which the following is a specification.

-This invention relates to certain new and useful improvements in Cornish or Scotch marine boilers of that type in which provision is made for more thorough utilization of the heating power and, at the same time, facilitating the circulation of water and causing a more rapid generation of steam.

I am aware that many attempts have been made to put a coil in the back connection of a Scotch marine boiler, but, so far'as known to me, these have failed because they will stand only as long as there is water in them, and to do so, feed pumps have been provided and kept continually working.

One of the objects of the present invention is to overcome the above objection, which I accomplish by providing a pipe leading from the bottom of the boiler, in which line pipe I provide a check so disposed that water will pass from the bottom of the boiler, but water cannot enter the boiler. When the pumps are working, the feed water passes through the chamber or coil in the back connection, which is exposed to the flames,,thus heating the water to a L very high degree, resulting in a saving of fuel and getting more power out of the boiler. When the feed pump is stopped, the water in the coil becomes very hot and leaves the coil and passes into the top of the boiler and the heater is supplied from the pipes leading from the bottom of the boiler. The feed water enters the boiler near the lowwater level and the pipes leading from the bottom of the boiler and attached to the bottom of the heater make it almost impossible for the heater to ever be without water. 'The pipes being connected at the bottom and top, the water finds its level.

I not only circulate the water, but pass the feed water into the boiler at a very high degree of temperature and the hotter the the water is very liable, when feeding, to

pass into the .bottom and no benefits are derived. Take, for instance, the case of a tllg lying at a wharf, leaving and starting on a job; it is some time before it warms up enough to do any hardwork. Usually some kind of a heater is used, such as heating the water with exhaust steam, but this is slow to work and requires .attention. With my present improvement, as soon as the fires are set away or broken down, the flames and heat heat the coil and heating the water commences; when the feeds are started and the water passes through the coil it goes into the boiler very hot, and the hotter the fires the hotter the feed water becomes. Tugs very often go and have to fire very hard to make steam, to do heavy work for a very few mo ments. Now, what takes place when the boat is suddenly stopped with roaring fires, to keep the coil full of water? The pumps have to be worked continually and they pump too much water into the boiler. With my present improvement, as soon as the boat stops and the engine is stopped, no pump is necessaryas far as the heater is concerned. Thewat er comes into the same from the bot tom as fast as the heat can send the water into the top from the coil, thus keeping up a good circulation. The bottom of the boiler is kept hot all the time, thus saving the cost of repairs by reducing leaks in the bottom and around all the stay bolts where generally there is trouble caused by leakage.

Other objects and advantages'of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claim.

The invention is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a part of thisspecification, and in which Figure 1 is a substantially central vertical section through a Cornish marine boiler provided with my present improvement.

Fig. 2 is a vertical section at right angles to Fig. 1, with portions in end elevation.

Fig. 3 is an enlarged section on line 33 of Fig. 1 looking in'the direction of the arments are shown as applied.

My present improvement, embodying the feed water heater and circulator, may be placed in the back connection of the furnace, the smoke box or in any other position ex posed tozthe heat from the fire. In the pres.

ent'instance, I have shown what I consider the preferable arrangement, but it is to be understood that the invention is not to be restrictedj'to such disposition of the parts,

' reservingthe right to make such changes as come fully within the scope of the appended claim. The parts are duplicated upon opposite sides of the boiler and a description of those upon one side will suffice I l for both. 2'is a pipe connected with the bottom of the boiler and provided with a valve 3 near its junction with the boiler. This pipe extends outside of the boiler and enters the end of the same, as at 1, and is thence I continued through the bottom part of the boiler, as at 5, and thence upward, as at 6, into the heater and thence through the tubes, as at 7, to the front and thence, as at 8, to the boiler near the low-water line thereof, as indicated at 9 in Fig. 1. Near its entrance into the boiler this pipe is provided with avalve 10 and adjacent thereto with a check valve 11, as seen best in Fig. 1. The pipe 2 adjacent the point of connection from thebottom of the boiler is provided with a reverse check valve 12, as seen in Fig. 1. This reverse check Valve 12 serves to stop the water from going into the bottom of the boiler when the feed pump is working.

When the feed pump is stopped, a continual flow of water passes into the heater, thus preventing the latter from burning out. It keeps up a constant circulation, thus warming the bottom of the'boiler.

A three-way cook 13 is placed in the feed line where the water enters the heater through the supply pipe 14:, so that, in case of accident,,this cock may be'turned so as to 'send the feed into the boiler, thus cutting out the use of the heater. All other stops accident, so that it is desirable to cut out the use of the heater. WVith the three-way valve 13 inthe position shown in Fig. 3, water flowing through the supply pipe 14 passes through the ports of the valve into the pipe 5, but. when the valve is turned a half revolution the entrance to the pipe 5 is closed and water thus flows from the supply pipe directly into the pipe 15 and thence into the water space of the boiler. Circulation is always maintained either through the pipe 5, or the pipe 15, when the feed pump of the boiler is in operation, as will be readily understood.

Any number of connections can be made from the bottom and other places where the desired results are expected.

In use upon a tug, it is left at night just the same as the boiler is always left;in fact, no attention has to be paid to the boiler in this respect.

All parts are on the outside of the boiler. I .not only keep up a circulation of the water, but pass the feed water into the boiler at a very high temperature.

By duplicating the parts upon both sides, which is done on account of bracing, as no braces will stand in any such place exposed to fire, I not only have free access to the parts for repairs or otherwise, but the parts may be applied more readily and with greater ease. The pipes leading from the bottom of the boiler and attached to the bottom of the heater render it practically impossible for the heater to ever be without water; the pipes being connected at the bottom and top, the water finds its level. The feed water enters the boiler atsubstantially 240 F. and the'bottom of the boiler the boiler'to said three-way valve and ha v-- ing a check valve therein, opening to permit the passage of water from the bottom of said boiler to said three-way valve, a third pipe leading from said three-way valve directly to the boiler, a fourth pipe leading from said valve and extended through the fire is at all times open, whereby said feed water tube of the boiler and comprising a feed may -be passed directly into the boiler water heater, an outlet from said heater eX- through said third pipe or through said tending outside the boiler and entering the fourth pipe and heater into the boiler.

5 side thereof at the low-water level, and ports In testimony whereof I aifix my signature 15 in said valve so arranged that the feed water in the presence of two witnesses.

is controlled in all its flows directly by said RICHARD WALSH. three-way valve and the passage of the Water Witnesses: from the bottom of the boiler through said 7 JAMES DRUHAN,

10 second pipe and three-way valve to the boiler RICHARD SPENCER.

Copies of this patent may be obtainerifor five cents each, by addressing the Commissioner of lPatents, Washington, D. G. 

